We numerically and experimentally demonstrate an all fiber parametric frequency combs generator with only one continuous-wave (CW) laser. The light from the laser is launched into a section of fiber to stimulate Brillouin scattering. The scattered Stokes wave and the transmitted wave are used as two seeds to pump parametric process in a highly nonlinear fiber (HNLF). The generated comb lines with a spacing equal to a Brillouin frequency shift of the fiber. To further improve the experimental results, the length of single mode fiber (SMF) used for pulse compression is optimized by numerical simulation. The results show that with a 100-m SMF, a 38-tone frequency comb spaced at 10.67GHz with a 10dB power variation can be obtained.
An architecture of wavelength division multiplexing (WDM) optical packet switching (OPS) router with all-optical
regenerators is proposed. The regenerator based on phase-sensitive amplifier (PSA) can simultaneously provide phase
and amplitude regeneration for quadrature phase-shift keying (QPSK) or differential quadrature phase-shift keying
(DQPSK) signals. The simulation results show that three regenerators are sufficient for an OPS router in a node with a
nodal degree of five to keep blocking probability below 5% and throughput ratio above 95% under different intensities of
self-similar traffic load.
An all-optical regenerator for Quadrature Phase-Shift Keying (QPSK) and Differential Quadrature Phase-Shift Keying
(DQPSK) signals based on Phase-Sensitive Amplifiers (PSAs) is studied through numerical simulations. It is found that
the regenerator can provide significant suppression of both amplitude and phase noise, and that the BER performance of
the regenerated signals can be greatly improved.